hi,
i have set-top from coship in my showroom, i has composite video, s-video and component video. i connected all those three video outputs to my 29" philips crt tv for demo in my showroom at chennai. all three video inputs differs from each by colour, contrast, black level depth, and picture shaking artifacts. the composite is the least and it gives a bad video quality, the s-video it somehow improves the quality by improving picture stablizing and some differnts in colours, but its the best in black level depth or in contrast level. the final component gives really a good clean black level details,good balanced colours throughout the video and great improvement from contrast of the overall picture.
so, from my conclusion and experience, i had from those three video outputs, im giving this deatils for you.even i demonstrates this to my customers in the showroom.